
Added information~
SKY is composed of the three top-most universities starting with "S", "K", and "Y", with "S" as Seoul University being the top 1 among them. Just to clarify that Sky uni doesn't literally represent how far Seoul University is above the others. ^^ But it is indeed the best. :)
S = Seoul University
K = Korea University
Y = Yonsei University

Well... in my country if u want to chance the University u need to take another test (different one) but with the same degree of difficulty or the University chooise u for deserving (almost never happens)... So i don't know, but i don't think that there the studants can change university without doing anything... or maybe i'm wrong ( ̄∇ ̄") I want to know too...

But don't you have to be good (high GPA) for them to accept you since they are such a good university? Your grades from previous college? Honestly that is more correct representation of how you will do in college. There's no way anyone who wants to transfer in then they can. I don't know the Korean transfer system but I doubt it is that easy to transfer to a good school. Imagine if it is easy then everyone can after they got into a suck school then just transfer to a better school.

I think because it's easier to get good gpa in lower grade uni, at least in here (SE asia). The regular acceptance test a lot harder than the one for transfer student.

I do agree, what you say is totally logical! And it's not fair to demonise or marginalise people who transfer anyway - maybe they had to move, or maybe their circumstances changed in some way. Maybe they transferred to an equal or even a less prestigious school. Leave 'em alone!!
But I think it might still be easier - or other students might perceive it as "easier" - because unlike the official acceptance tests you wouldn't be competing against everyone else in the country.

Yep, according to my friend it's insanely stressful. Getting into a top uni, or the uni of your choice, can come down to a single mark because you're ranked against the whole country. If 270 people get the absolute top mark, say 100/100, and you miss out on one mark and get 99/100, your "rank" isn't 2, it's 271, because 270 people got a higher mark than you did.
I work in a Korean day care (in Sydney) run by my Korean ex-pat friend, and she's told me a lot about the education system over there. Basically, from what she's told me, in high school Korean kids study every day from 7am til 10pm (school then cram school), all to take ONE day of university acceptance tests. This one day will give them a number, which ranks them out of every single person in Korea who's taking the tests that year. And that number will decide their future because it decides which uni they've made it into.
Universities are ranked, too, and the uni you go to determines what kind of job you can get, and what calibre of company will hire you. Eg. Seoul Uni is called "Sky Uni" because it's so far above the others, and is treated as a guaranteed passport to a successful life. If someone doesn't make it into a "good enough" uni, it's pretty much like their chances of a successful life are ruined. It actually sounds really harsh to me. So maybe transferring might be resented because it's seen as kind of getting around the system?
I think Hyung is being a douche about it, of course, but just thought I'd add my two cents from what my friend has told me!!